But the bootloaders got unlocked fast? The One X got unlocked and got ROMs on it.
You guys act like Samsung is some sort of awesome company or something? Sure they hired Cyanogen himself, but have any of you followed development for the i9300 or i9100? It was nearly impossible to get butter running on JellyBean. Not to mention there were issues like memleak that plagued the CM builds forever. Only until recently did Samsung's released drivers and sources start helping out, and even then it's nothing like the HTC Qualcomm devices which are far easier to develop for or Sony's devices which are nearly reference.
Anyway, I think the locked bootloader is just meh. It's nice to have an unlocked bootloader, but that's not why the company is sinking.
As for marketing, there's close to none in the US, but in Asia, I saw huge billboards and buildings plastered with Incredible S and Sensation ads. I've seen less with the HTC One series though surprisingly, but there's still some presence. To be honest though, dilution through the introduction of too many models is the big thing hurting them. Samsung built up the Galaxy S to iPhone status. HTC failed to do so with their flagship.
In the US marketing is a bigger issue for HTC. Not only do they have very few ads, they let the carriers rip them apart. Verizon basically killed HTC's phones by making sure they have Droid Incredible in front of them. While Samsung has been able to promote the Galaxy S3 as ONE phone across all carriers, HTC cannot do the same. There's Evo, Droid Incredible, and One on AT&T. They bent over hard for the US carriers using the old model of carrier exclusive phones and got screwed.